Londonist in your inbox

Plan your day ahead or read the day's London headlines with our daily emails.

Things to do in London (weekday picks sent at 7pm the night before)Londonist Daily (news and features digest, sent out at 5pm each day)Best of Londonist (weekly email, sent Sunday morning)The Weekend Guide (sent Thursday lunchtime)

Designed by Edward Barber and Jay Osgerby, who were responsible for the 2012 Olympic torch, one coin shows a train emerging from a tunnel with edging reminscent of tube map interchanges. The other is a roundel with ‘MIND THE GAP’ on the side.

If you’re one of the first to find a coin, The Royal Mint wants to hear about it on their Facebook page or send them a tweet using the hashtag #Tubecoin.